[c-nsp] broken counters on sup720 (not 32bit snmp issue)

[John Payne]

On Jun 26, 2006, at 6:25 PM, Bas wrote:

> Hi,
>
> I've got a 6506/sup720 running 12.2.18SXF4 with some strange  
> behaviour.
>
> One vlan generates about 4Gbit/s traffic, but both snmp and "sh int
> vlan xx" report incorrect values.
>
> The rollover point seems to be around 3.5Gbit/s, after that values are
> reported to be around 700Mbit/s and up.
>
> before rollover:
>
> mgr-r1#sh int vlan 11 | i minu
>  1 minute input rate 3481725000 bits/sec, 299069 packets/sec
>  1 minute output rate 151468000 bits/sec, 165552 packets/sec
>
> After rollover:
>
> mgr-r1#sh int vlan 11 | i minu
>  1 minute input rate 780017000 bits/sec, 308148 packets/sec
>  1 minute output rate 156125000 bits/sec, 172028 packets/sec
>
> Strange enough packets/sec still increments correctly.
>
> Is this a know issue? Is there something I can do about this?

I would be very interested in hearing if you get anywhere with  
this... I'm having a devil of a time convincing the TAC there's an  
issue here, primarily because I don't control the device on the other  
end of the link that's reporting the correct issues.

FWIW, I'm on 12.2(18)SXF2 on Sup32s.